An Electronically Reconfigurable Reflectarray Based on Binary Phase Shifters for K-Band Radar Applications

Abstract

This contribution presents a reflectarray antenna at 24 GHz allowing electronic beam-scanning. The antenna elements are comprised of aperture-coupled patch antennas with openended microstrip lines on the backside to obtain the proper phase distribution on the reflectarray aperture. Electronic beamsteering is achieved by applying PIN diodes on the individual reflectarray elements. To simplify the control process of the antenna, the elements function as one-bit phase shifters either reflecting with 0° or 180° phase shift.